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Chapter 2    Data Replication 
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This section describes the replication operations and state transitions. 
 
Figure 2-2    Replication Operations and State Transitions 
 
The pair setting is specified 
but MV and RV are separated.
 
sep/exec 
Difference between MV and 
RV is being reflected.
The pair setting is specified 
and synchronization has been 
established.
exec : Executing Replicate, Separate, or Restore 
sync : Replicate or Restore synchronization state 
rpl  : replicate (Replicate)   
rpl/exec ............. Executing synchronization 
rpl/sync ............. Synchronization state 
sep  : separate (Separate)   
sep/exec ............ Executing Separate   
separated .......... Separate completion state   
rst  : restore (Restore)   
rst/exec ............. Executing Restore   
rst/sync ............. Synchronization state 
• When Restore(update) is 
executed, updates to MV are 
reflected to RV. 
• When Restore(protect) is 
executed, updates to MV are not 
reflected to RV. 
• As a rule, access to RV is not 
allowed. 
MV 
RV 
rpl/exec 
MV 
RV 
separated 
sync 
rst/exec
• MV and RV can be 
updated.
 
Replicate
• RV cannot be updated.
Restore 
• RV cannot be updated.
Separate 
• As a rule, RV cannot 
be updated.
• When Restore(protect) is executed, 
Synchronous State (rst/sync) is 
placed and then automatically 
changed to Separated State 
(separated). 
MV 
RV 
rpl/sync 
rst/sync 
• Updates to MV are reflected to RV.
• As a rule, access to RV is not 
allowed.
MV 
RV